First, you can't "unknowingly lie" except by the most general definition of the word, and that's clearly not what Stubs is referring to.
Second, it's easy to justify something by saying "well I'd do it to save someone's life" because that just paints you as a hero and glosses over whatever you've done. Doesn't make it any less immoral. Two wrongs don't make a right, right? Maybe you don't believe in all that hoo-haa.

Of course, each person's definition of immoral may vary, since what we consider moral is based solely on what we have been raised to believe as such. I guess I could see how the younger generation could have a very skewed sense of morality given what saturates entertainment these days combined with the absurd lack of familial structure and discipline. But I dare say that this is more or less exactly the future that Paul Harvey warned us about.